What Everyone knows about Torque Management?

[The Ladies Man]

i am just wondering what everyone knows about T.M. like what it does? how bad is it if you remove it? and anything else you might know.

[Slowprocess]

Torque Management
Torque management is a function of the PCM that reduces engine power under certain conditions. Torque management is performed for the following reasons:
To prevent over-stressing the powertrain and driveline components
To prevent damage to the vehicle during certain abusive maneuvers
To reduce engine speed when the IAC is out of the normal operating range
The PCM monitors the following sensors and engine parameters in order to calculate engine output torque:
The air/fuel ratio
The mass air flow (MAF ) sensor
The manifold absolute pressure sensor
The intake air temperature (IAT ) sensor
The spark advance
The engine speed
The engine coolant temperature (ECT ) sensor
The A/C clutch status
The PCM monitors the torque converter status, the transmission gear ratio, and the engine speed in order to determine if torque reduction is required. The PCM retards the spark as appropriate to reduce engine torque output if torque reduction is required. The PCM also shuts OFF the fuel to certain injectors in order to reduce the engine power in the case of an abusive maneuver.

The following are instances when engine power reduction is likely to be experienced:
During transmission upshifts and downshifts
During heavy acceleration from a standing start
When the clutch pedal is released too quick under a heavy load, 6.0L only
When one set of drive axles looses traction while the other set of drive axles are not moving, 4 Wheel Drive only and in 4WD low
If the IAC is out of the normal operating range, except 6.0L
When the driver is performing harsh or abusive maneuvers such as shifting into gear at high throttle angles or shifting the transmission from reverse to drive to create a rocking motion
The driver is unlikely to notice the torque management actions in the first 2 instances. The engine power output is moderate at full throttle in the other cases.

The PCM calculates the amount of spark retard necessary to reduce the engine power by the desired amount. The PCM disables the fuel injectors for cylinders 1, 4, 6, and 7 in the case of an advasive maneuver


On a stock truck it probably isn't that big of a problem but when you get more power it becomes alot more noticable, at the same time when you get more power you actualy need it if you have a stock tranny.

my advice, if you plan on doing a significant number of mods to your truck just plan on a built tranny and then completely get rid of TM with tuning.

[The Ladies Man]

when you mean built tranny what do you mean? the whole thing tore apart and replaced with better parts. or a shift kit and better servos.

[The Ladies Man]

To reduce engine speed when the IAC is out of the normal operating range. what is IAC and i was wondering that the A/C clutch status has to do with TM

[Slowprocess]

I just used the description of torque management that one of my friends had sent to me in an email a long time ago. The IAC is the idle air control. To my best understanding, this is what sends air through the throttle body when the throttle body is closed and the engine is idling. I would say that the reason torque management has to do something with the status of the clutch fan because when the clutch fan is on, the truck has a considerable loss of both hp and torque, so if it is engaged, torque management would not be needed due to the already decrease in hp and torque caused by the clutch fan being activated.

[The Ladies Man]

When you say i would get a built tanny the completly eliminate T.M. what do you consider a built tranny. and do you think it would be safe to eliminate T.M. with a shift kit and better servo. or just lower it. because with westers chip in their catagory for torque mangement they let you choose from leaving factory t.m., lowering t.m. or eliminating t.m. andi was thinking about lowering t.m.

[Slowprocess]

I would consider a built tranny a performance tranny with beefed up internals. I know some guys like to take out all of the tm with a shift kit and servos, but I plan on just taking out most of it. If I ever upgrade to a performance tranny, I'm gonna get all of it removed. In your case, I would get the shift kit, servos, and have some of it removed. I just don't think a stock tranny will hold very long with all the tm removed. It just wasn't built for that, but with the firmer shifts, some would be fine to take out.

[crazy6carl9]

how much did it cost you to get your shift kit and servo put in

[Slowprocess]

It's good to have friends. Stall, shift kit, servos, tranny cooler all for $250. I have heard that most people will charge at least $100 for the shift kit/servo. Don't quote me on that, but just check around. Shouldn't be much more than that at a local tranny shop.

[The Ladies Man]

Originally Posted by Slowprocess

It's good to have friends. Stall, shift kit, servos, tranny cooler all for $250. I have heard that most people will charge at least $100 for the shift kit/servo. Don't quote me on that, but just check around. Shouldn't be much more than that at a local tranny shop.

I guess so!!! i wish i lived by you, that way i could get in with your group of friends. they sure seem to know a lot about our trucks. i think that is what i am going to do. get the shift kit and a servo, then lower my torque management.

[The Ladies Man]

i think that is all i will be doing to my engine for a while. shift kit, servo, and get my pcm reprogrammed. its time for a new toy, Yamaha Banshee. i want to get my toys before it is time to got out into the realworld. because i guess that is what you do when you get out of college. plus i want to move away from Michigan. i want somewhere where it doesn't snow. that way i can sell my truck and get a 2wd. that way i can start out being faster.

[ChevyWade]

some day i will have a better job and be cool like u guys, high school sucks

[jeverett]

Do all trucks 99 and up have the Torque Management in them?

[The Ladies Man]

Originally Posted by jeverett

Do all trucks 99 and up have the Torque Management in them?

i think so. i guess we will have to wait for slow process. im sure he will know

[Slowprocess]

Yeah, unfortunately, gm blessed all of the 99 up trucks with tm. It's a good thing to have if you use your truck for normal operations. If you've noticed, alot of the older gm trucks had a ton of problems with trannies. They put this in here to help solve some of these problems and to cover their own butts. But with a shift kit and servos, you eliminate most of these problems, which is mainly due to soft shifts that put excess wear on the tranny. With the shift kit/servos, you get firm shift points and the tranny locks in so much better. That is why you can take out most of the tm. I can't wait to get rid of my superchips and get a custom tune. I think I'm gonna buy ls1edit and tune myself. It's a pretty advanced program, but I have tons of local support, and I'm always upgrading something. The more horsepower you get, the more torque management seems to show its ugly head. And if I can get my hands on a good 6.0L, I want to be able to run the hell out of it without the torque management slowing me down.